Specifications

mikroElektronika | Free Online Book | PIC Microcontrollers | Chapter 5: CCP Modules

Similar to the pervious module, this circuit is under control of the bits of the control register. This time, it is the CCP2CON

CCP2CON Register

Fig. 5-10 CCP2CON Register

DC2B1, DC2B0 - PWM Duty Cycle Least Significant bits - are only used in PWM mode representing two least significant bits

of a 10-bit number. This number determines PWM signal’s duty cycle. The rest of bits (8 in total) are stored in the CCPR2L

CCP2M3 - CCP2M0 - CCP2 Mode Select bits select CCP2 mode.

CCP2M3 CCP2M2 CCP2M1 CCP2M0 Mode

0 0 0 0 Module is disabled (reset)

0 0 0 1 Unused

0 0 1 0 Unused

0 0 1 1 Unused

0 1 0 0

Capture mode

Every falling edge on the CCP2 pin

0 1 0 1

Capture mode

Every raising edge on the CCP2 pin

0 1 1 0

Capture mode

Every 4th rising edge on the CCP2 pin

0 1 1 1

Capture mode

Every 16th rising edge on the CCP2 pin

1 0 0 0

Compare mode

Output and CCP2IF bit are set on match

1 0 0 1

Compare mode

Output is cleared and CCP2IF bit is set on match

1 0 1 0

Compare mode

Interrupt is generated, CCP2IF bit is set and CCP2 pin is

unaffected on match

1 0 1 1

Compare mode

CCP2IF bit is set, Timer 1 registers are cleared, A/D conversion is

started if the A/D converter is on on match

1 1 x x

PWM mode

Table 5-6 CCP2CON Register

In short: Setup CCP1 module for PWM operation

http://www.mikroe.com/en/books/picmcubook/ch5/ (9 of 15)5/3/2009 11:33:21 AM